The Ref. 126711CHNR in detail
Ref. 126711CHNR is a perfect example of the logically stringent use of reference numbers at Rolex. Reference 126711CHNR provides the following information:
Since it is a six-digit reference, Ref. 126711CHNR is a latest-generation Rolex model. Rolex started with four-digit references and followed later with five-digit references. The six-digit references include wider cases, ceramic bezels and solid bracelets. They are also perfectly finished.
Since the reference starts with "12", the GMT-Master already has a Rolex mechanism of the latest generation. Among other things, Caliber 3285 has a Parachrome hairspring, a Chronergy escapement and an increased power reserve of about 70 hours. The clock accuracy is +/- 2 seconds per day.
The last digit of the Rolex references shows what material the watch is made of. The "1" stands for the material mix of Rolex Oystersteel (stainless steel) and Everose gold (rose gold). As an example, a "5" at the end would indicate solid Everose gold.